Homework Answers
Ans: The genotype of true breeding strain will be GG(dark green) and gg(light green). So that we get all F1 offspring are dark green.
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Two strains of true-breeding, light green corn plants are crossed to each other. All the F_1...
Two true breeding strains of peas, one with yellow and round seeds and the other with...
Two true breeding strains of peas, one with yellow and round seeds and the other with green and wrinkled seeds, were crossed. All the F1plants had yellow and round seeds. When these F1 plants were test crossed to the green and wrinkled parental strain, the following offspring were obtained: 30 yellow and round; 20 green and round; 26 yellow and wrinkled; 28 green and wrinkled. A) Please diagram the crosses described above, showing genotypes for each plant, using your own...
25. A cross is made between two different true-breeding strains of daylilies, both of which have...
25. A cross is made between two different true-breeding strains of daylilies, both of which have white flowers. All of the F1 generation plants have yellow flowers. When an F, offspring is crossed with either one of the parental strains, half of the offspring have yellow flowers and half of them have white flowers. Propose an explanation for this outcome. In your answer, you should describe the genotypes of the two parental strains and the F1 offspring, and also explain...
A true breeding plant for round and yellow seeds is crossed to a true breeding wrinkled...
A true breeding plant for round and yellow seeds is crossed to a true breeding wrinkled and green seeds. All progeny are round and yellow seeds. A plant from the F1 is crossed to a true breeding wrinkled and green seed's plant, producing the following offspring: 32 yellow and round seeds, 36 wrinkled and green seeds, 15 yellow and wrinkled seeds and 17 green and round seeds. What is the map distance between the color gene and the size gene?...
Two pure breeding lines of pepper, one dark green and round, the other light green and...
Two pure breeding lines of pepper, one dark green and round, the other light green and oval, are crossed. The F1 hybrid is dark green and round. The F2s assort in four phenotypic classes in a 9:3:3:1 ratio. Crossing a light green, oval F2 plant to a dark green, round one will produce ____ phenotypic classes:
Question #1 (3pts) A. Where in the cell cycle is the M checkpoint, and what is...
Question #1 (3pts) A. Where in the cell cycle is the M checkpoint, and what is its function? (1pt) B. Imagine a cell with a genetic mutation that prevents it from synthesizing functional cohesins. At what stage might the cell cycle be disrupted? And WHY? (1pt) C. What role do the non-kinetochore microtubules play during mitosis? (1pt) Question #2 (3pts) In a particular plant, leaf color is controlled by gene locus D. Plants with at least one allele Dhave dark...
In one of Mendel's experiments he crossed two rule breeding pea plants. One produces yellow and...
In one of Mendel's experiments he crossed two rule breeding pea plants. One produces yellow and round seeds and the other produces green and wrinkled seeds. Yellow and round are dominant traits whereas green and wrinkled are recessive. We will classify yellow as ''Y'' green as ''y'' round as ''R'' and wrinkled as "r" In part A show F1 generation using punnet square. In part B show a punnet square for F2 generation from dihybrid cross. In part C by...
You have two families of true-breeding diploid Zea mays(maize, corn) plants. Late flowering, with tall stalks...
You have two families of true-breeding diploid Zea mays(maize, corn) plants. Late flowering, with tall stalks Early flowering, with short stalks A cross between these two plants yields F1 hybrids that are late flowering, with tall stalks. Given this information, which alleles are dominant? Explain your reasoning. Using the letters F or f for flowering and T or t for stalk height, indicate the genotypes of the two plants. Plant 1 ______________ Plant 2 ___________________ What is the genotype of the...
A geneticist has found 2 independent true breeding strains of mice that are completely hairless. Both...
A geneticist has found 2 independent true breeding strains of mice that are completely hairless. Both mutations are recessive to wild-type. When mice of the 2 diff hairless strains are crossed to each other, all the mice have hair, ie, they have the wild type phenotype. Based on this evidence, what is the minimum number of genes that can mtate to give hairless phentoype? when wildtype F1 mice of the cross bt the 2 hairless strains are crossed to generate...
1. In one experiment, Mendel crossed a pea plant that bred true for axial flowers with...
1. In one experiment, Mendel crossed a pea plant that bred true for axial flowers with a pea plant that bred true for terminal flowers. All the F1 plants had axial flowers. Which is the recessive trait? Explain your answer. 2. Green pod color is a dominant allele in pea plants (G). If two plants with green pods are crossed, some of the offspring have yellow pods. What are the possible genotypes of the parents? 3. In garden peas, one...
46. (7 points) Vanessa has obtained two true-breeding strains of mice, each homozygous for an independently...
46. (7 points) Vanessa has obtained two true-breeding strains of
mice, each homozygous for an
independently discovered recessive mutation that prevents the
formation of hair on the body.
One of the mutant strains is called naked, and the other mutation
strain is called hairless. To
determine whether the two mutations are simply alleles for the same
gene, Vanessa crosses
naked and hairless mice with each other (cross 1). All the
offspring are phenotypically wild-
type.
A) What is the most...
25. A cross is made between two different true-breeding strains of daylilies, both of which have white flowers. All of the F1 generation plants have yellow flowers. When an F, offspring is crossed with either one of the parental strains, half of the offspring have yellow flowers and half of them have white flowers. Propose an explanation for this outcome. In your answer, you should describe the genotypes of the two parental strains and the F1 offspring, and also explain...
A true breeding plant for round and yellow seeds is crossed to a true breeding wrinkled and green seeds. All progeny are round and yellow seeds. A plant from the F1 is crossed to a true breeding wrinkled and green seed's plant, producing the following offspring: 32 yellow and round seeds, 36 wrinkled and green seeds, 15 yellow and wrinkled seeds and 17 green and round seeds. What is the map distance between the color gene and the size gene?...
Question #1 (3pts) A. Where in the cell cycle is the M checkpoint, and what is its function? (1pt) B. Imagine a cell with a genetic mutation that prevents it from synthesizing functional cohesins. At what stage might the cell cycle be disrupted? And WHY? (1pt) C. What role do the non-kinetochore microtubules play during mitosis? (1pt) Question #2 (3pts) In a particular plant, leaf color is controlled by gene locus D. Plants with at least one allele Dhave dark...
46. (7 points) Vanessa has obtained two true-breeding strains of
mice, each homozygous for an
independently discovered recessive mutation that prevents the
formation of hair on the body.
One of the mutant strains is called naked, and the other mutation
strain is called hairless. To
determine whether the two mutations are simply alleles for the same
gene, Vanessa crosses
naked and hairless mice with each other (cross 1). All the
offspring are phenotypically wild-
type.
A) What is the most...
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